JSFiddle - React, Tailwind, and code Playground

HTML

<form name="vegForm" action="veg.aspx" >
    <select onchange='this.form.submit()'>
    </select>
</form>
<script>
    var veg = ["leek", "turnip", "carrot"];
    (function(){
        var form = document.getElementsByName("vegForm")[0];
        var select = form.getElementsByTagName("select")[0];

         for(var i = 0, len = veg.length; i < len; i++){
             var val = veg[i]; 
             select.options[i] = new Option(val, val);  
         }
    }());
</script>